杂项 函数
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connection_aborted

(PHP 4, PHP 5)

connection_aborted — 检查客户端是否已经断开

说明

int connection_aborted ( void )

检查客户端是否已经断开。

返回值

如果客户端已经断开则返回1，否则返回0。

参见

杂项 函数
在线手册：中文 英文
PHP手册
PHP手册 - N: 检查客户端是否已经断开

用户评论:

djdark88 dot 7 at gmail dot com (24-Jun-2011 09:24)

Hmm i went and did the same thing for a realtime application i got some more bugs..

<?php
// Signin Script
while(!connection_aborted())
{

while(!$result and !connection_aborted())
 {
     // FETCH RESULT VIA SQL
    if(SQL DUMPS SOMETHING)
        { $result =true;
        }
 }

// SEND RESULT

echo "<br>" ; // To make this work on chrome
flush();obflush(); // FLUSH (in flush u will need to add a <br> with the flushed data in order to get the response sent to user if the user is using chrome )

}

//Signout Script
?>

even in my script it sometimes does NOT sent the result!!!

Luciano (18-Dec-2009 09:01)

In order to detect a disconnection inside the script we need to flush the buffer (it is only when the the server tries to send the buffer content that it will see that the connection is broken).

Thus we need to use the ob_implicit_flush() function to flush automatically the buffer

This is an example of a disconnection detection :

<?php
  // enables the automatic flush
  ob_implicit_flush();

  function verifyCommunication() {
    $status = (connection_aborted()?"not ":"") ."sent";
    persistCommunication(new Communication($status));
  }

  // we will check the communication state when the script finished
  register_shutdown_function(verifyCommunication);
  echo "blabla";
  // this sleep is used to have time to break the connection on the client side
  sleep(10);
  echo"tata";
?>

I use such a process to cancel a request if the client didn't get the acknowledgement because he will redo his request...

rickyale at ig dot com dot br (13-Nov-2009 07:49)

(connection_aborted not working)
I had this problem years ago, now the problem came back after upgrading php... i tried everything i found and in the end the function ob_end_flush();  on top of script as post in php bug track solved the problem. Im using windows 7 x64 / php 5.2.4 / apache 2.2.14 (win32)

try adding ob_end_flush(); on top of you script.
i read something about this but can't remember where, it was related to a bug or something.

hope this help.

phpcoder at cyberpimp dot techlab dot info (27-Jun-2007 07:50)

Although the documentation indicates it returns an int, I found comparing the return value with numeric values does not seem to work.

Example (does not work):
<?php
if (connection_aborted()==1) {
fwrite($filehandle, 'aborted!');
}
?>

You're better off just assuming it returns boolean

Example (does work):
<?php
if (connection_aborted()) {
fwrite($filehandle, 'aborted!');
}
?>

rickyale at ig dot com dot br (14-Dec-2002 12:29)

I know why nobody can use the functions connection_XXX(). If the php code do not send anything to buffer, the php dont check the connection, so, the connection_timeout will still NORMAL and will not be ABORTED.

Ex

<?php
Set_Time_Limit(0);  //this you know what gonna do
Ignore_User_Abort(True); //this will force the script running at the end

While(!Connection_Aborted()) {
   Echo "\n"; //this will save de while
   Flush(); //Now php will check de connection
    While(CONDITION) {
        Echo "My chat....";
    }
 Sleep(1);
}
?>

end